Search Results - "Wilkening, M"

F anion dynamics in cation-mixed nanocrystalline LaF3: SrF2 by Breuer, S., Lunghammer, S., Kiesl, A., Wilkening, M.

“…Ion dynamics in nanocrystalline materials can be quite different compared to that in materials with μ m-sized crystallites. In particular, the substitution of…”
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The microstructure matters: breaking down the barriers with single crystalline silicon as negative electrode in Li-ion batteries by Sternad, M., Forster, M., Wilkening, M.

“…Silicon-based microelectronics forms a major foundation of our modern society. Small lithium-ion batteries act as the key enablers of its success and have…”
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Rapid Li Ion Dynamics in the Interfacial Regions of Nanocrystalline Solids by Breuer, S, Uitz, M, Wilkening, H. M. R

“…Diffusive processes are ubiquitous in nature. In solid state physics, metallurgy and materials science the diffusivity of ions govern the functionality of many…”
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Tuning the Li Diffusivity of Poor Ionic Conductors by Mechanical Treatment: High Li Conductivity of Strongly Defective LiTaO3 Nanoparticles by Wilkening, M, Epp, V, Feldhoff, A, Heitjans, P

“…Lithium tantalum oxide, LiTaO3, with an average particle size in the µm range is known as a very poor Li ion conductor. It is shown here that its Li…”
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Ultraslow Li Exchange Processes in Diamagnetic Li2ZrO3 As Monitored by EXSY NMR by Bottke, P, Freude, D, Wilkening, M

“…Two-dimensional (2D) 6Li exchange magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy was used to probe extremely slow lithium hopping…”
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Structural Disorder in Li6PS5I Speeds 7Li Nuclear Spin Recovery and Slows Down 31P Relaxation–Implications for Translational and Rotational Jumps as Seen by Nuclear Magnetic Resonance by Brinek, M, Hiebl, C, Hogrefe, K, Hanghofer, I, Wilkening, H. M. R

“…Lithium-thiophosphates have attracted great attention as they offer a rich playground to develop tailor-made solid electrolytes for clean energy storage…”
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Mechanically Induced Phase Transformation of γ-Al2O3 into α-Al2O3. Access to Structurally Disordered γ-Al2O3 with a Controllable Amount of Pentacoordinated Al Sites by Düvel, A, Romanova, E, Sharifi, M, Freude, D, Wark, M, Heitjans, P, Wilkening, M

“…One of the most important goals in materials science is the modification and design of solids to obtain functionalized materials with tailored properties…”
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NMR relaxometry as a versatile tool to study Li ion dynamics in potential battery materials by Kuhn, A., Kunze, M., Sreeraj, P., Wiemhöfer, H.-D., Thangadurai, V., Wilkening, M., Heitjans, P.

“…NMR spin relaxometry is known to be a powerful tool for the investigation of Li+ dynamics in (non-paramagnetic) crystalline and amorphous solids. As long as…”
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Li ion dynamics along the inner surfaces of layer-structured 2H-LixNbS2 by Stanje, B, Epp, V, Nakhal, S, Lerch, M, Wilkening, M

“…Layer-structured materials, such as graphite (LiCy) or Lix(Co,Ni,Mn)O2, are important electrode materials in current battery research that still relies on…”
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From ultraslow to fast lithium diffusion in the 2D ion conductor Li0.7TiS2 probed directly by stimulated-echo NMR and nuclear magnetic relaxation by Wilkening, M, Küchler, W, Heitjans, P

“…7Li stimulated-echo NMR and classical relaxation NMR techniques are jointly used for the first time for a comprehensive investigation of Li diffusion in…”
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Fast Na ion transport triggered by rapid ion exchange on local length scales by Lunghammer, S., Prutsch, D., Breuer, S., Rettenwander, D., Hanzu, I., Ma, Q., Tietz, F., Wilkening, H. M. R.

“…The realization of green and economically friendly energy storage systems needs materials with outstanding properties. Future batteries based on Na as an…”
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Mechanically induced decrease of the Li conductivity in an alumosilicate glass by Kuhn, A., Wilkening, M., Heitjans, P.

“…In the present work β-spodumene LiAlSi 2O 6 and the corresponding glass form a model system highly suitable to study the influence of particle size on Li ion…”
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Lithium barrier materials for on-chip Si-based microbatteries by Janski, R., Fugger, M., Forster, M., Sorger, M., Dunst, A., Hanzu, I., Sternad, M., Wilkening, M.

“…The integration of lithium-ion batteries, featuring ultra-high discharge rates, directly into silicon-based semiconductor devices opens unique paths towards…”
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Partial electronic conductivity of nanocrystalline Na2O2 by M Philipp, S Lunghammer, I Hanzu, M Wilkening

“…Understanding charge carrier transport in Na _2 O _2 , being one of the possible storage materials in the non-aqueous Na–O _2 battery, is key to the…”
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Ion dynamics in a new class of materials: nanoglassy lithium alumosilicates by B Stanje, P Bottke, S Breuer, I Hanzu, P Heitjans, M Wilkening

“…In many cases nanocrystalline materials, prepared through high-energy ball milling, reveal enhanced ion dynamics when compared to the situation in the…”
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New prospects in studying Li diffusion—two-time stimulated echo NMR of spin-3/2 nuclei by Wilkening, Martin, Heitjans, Paul

“…The measurement of diffusion parameters like activation energies and translational jump rates of small cations plays a key role in materials science…”
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Ion conduction and dynamics in mechanosynthesized nanocrystalline BaLiF3 by Düvel, A., Wilkening, M., Wegner, S., Feldhoff, A., Šepelák, V., Heitjans, P.

“…Highly pure nanocrystalline BaLiF3 (space group Pm3̄m, inverse perovskite structure) with a mean crystallite size of the order of 30nm was mechanosynthesized…”
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Dispersed Solid Conductors: Fast Interfacial Li-Ion Dynamics in Nanostructured LiF and LiF:γ-Al2O3 Composites by Breuer, S, Pregartner, V, Lunghammer, S, Wilkening, H. M. R

“…Lithium fluoride serves as a model substance to study Li and F hopping processes in a material solely composed of mobile ions with an opposite charge. In its…”
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Proton Bulk Diffusion in Cubic Li7La3Zr2O12 Garnets as Probed by Single X‑ray Diffraction by Hiebl, C, Young, D, Wagner, R, Wilkening, H. M. R, Redhammer, G. J, Rettenwander, D

“…Ceramic electrolytes, characterized by a very high ionic conductivity as it is the case for Al-stabilized cubic Li7La3Zr2O12 (Al:LLZO), are of utmost interest…”
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Structural Disorder in Li 6 PS 5 I Speeds 7 Li Nuclear Spin Recovery and Slows Down 31 P Relaxation-Implications for Translational and Rotational Jumps as Seen by Nuclear Magnetic Resonance by Brinek, M, Hiebl, C, Hogrefe, K, Hanghofer, I, Wilkening, H M R

“…Lithium-thiophosphates have attracted great attention as they offer a rich playground to develop tailor-made solid electrolytes for clean energy storage…”
Get full text